body {
  font-family: system-ui, sans-serif;
  max-width: 640px;
  margin: 2rem auto;
  padding: 0 1rem;
}

label {
  display: block;
  margin-bottom: 0.5rem;
}

section {
  margin-top: 1.5rem;
  padding: 1rem;
  border: 1px solid #ddd;
  border-radius: 8px;
}